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BNB Chain, a blockchain linked to the Binance cryptocurrency exchange, disclosed an exploit on a cross-chain bridge that drained around $100 million in digital assets.

“There was an exploit affecting the native cross-chain bridge between BNB Beacon Chain (BEP2) and BNB Smart Chain (BEP20 or BSC), known as ‘BSC Token Hub,'” it said last week. “The exploit was through a sophisticated forging of the low level proof into one common library.”

According to Binance CEO Changpeng Zhao, the exploit on the cross-chain bridge “resulted in extra BNB,” prompting a temporary suspension of the Binance Smart Chain (BSC).

“BNB, which stands for ‘Build and Build’ (formerly called Binance Coin), is the blockchain gas token that ‘fuels’ transactions on BNB Chain,” Binance noted earlier this February.

No user funds are said to have been impacted, since the vulnerability in the BSC Token Hub bridge enabled the unknown threat actor attacker to mint new BNB tokens in an unauthorized manner.

images from Hacker News